28992105 has 24 divisors (see below), whose sum is σ = 51425088. Its totient is φ = 15101856.

The previous prime is 28992101. The next prime is 28992107. The reversal of 28992105 is 50129982.

It is not a de Polignac number, because 28992105 - 2² = 28992101 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28992105.

It is not an unprimeable number, because it can be changed into a prime (28992101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5557 + ... + 9426.

It is an arithmetic number, because the mean of its divisors is an integer number (2142712).

Almost surely, 2^28992105 is an apocalyptic number.

It is an amenable number.

28992105 is a deficient number, since it is larger than the sum of its proper divisors (22432983).

28992105 is a wasteful number, since it uses less digits than its factorization.

28992105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15037 (or 15034 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 28992105 is about 5384.4317248898. The cubic root of 28992105 is about 307.2037996458.

The spelling of 28992105 in words is "twenty-eight million, nine hundred ninety-two thousand, one hundred five".